Power-shovel.



W M. HALE.

POWER SHOVEL. APPLICATION FILED 11111.31. 1910,

Patented May 23, 1911.

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awuemto'o Guam:

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Patented May 23, 1911.

W. M. HALE.

POWER snovnn. APPLICATION TILED 138.31. 1910.

W. M. HALE.

POWER SHOVEL.

APPLICATION FILED AUGJXI, 1910.

Patented May 23. 1911.

4 SHEETS-SHEET 3.

MW 4M W. M. HALE.

POWER SHOVEL.

APPLICATION FILED AUG.31.1910,

993,059. Patented May 23, 1911.

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UNITED STATES PATENT OFFICE.

WILLIAM M. HALE, OF NASHVILLE, TENNESSEE.

POVIER-SHOVEL.

'To all whom it may concern:

Be it known that I, )VILLIAM M. IIALE, citizen of the United States, residing at Nashvillefin the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Power- Shovels,- of which the following is a'specilication.

This invention relates to power shovels or excavators of the shovel type and comprises a shovel pivotally mounted at the outer ends of thrust beams, the inner ends of which are connected to crank arms projecting from a rock shaft operated by suitable transmis sion devices. A- hoisting yoke and'cable is connected to the shovel arms, and the cable passes thence over sheaves to a hoisting drum. This mechanism is supported on a turntable carried by a car, the turntable permitting lateral swing of the shovel, and the car permitting the apparatus to be advanced into the' body of the material. The car is driven by a motor mounted on the turntable,-by ineans 'of a central upright shaft and gearing to the car wheels. 1 mproved devlces are provided for driving the car, for rotating the turntable, and for hoisting the shovel, as well as for-operating the shovel to dig into the material.

Various other improvements with respect to the details of construction will be apparent fromthe following description and the accompanying drawings.

In the drawings Figure 1 is a side elevation of the apparatus. Fig. 2 is a plan view 'of the turntable and the gearing carried thereby: Fig. 3 is an end elevation showing particularly an upright frame and the parts supported thereby. F ig. l is an inverted plan view of the ear. Fig. 5 is a detail in vertical section of'the turning and driving devices for the car and turntable. Fig. (3 is an enlarged detail side elevation of the shovel and its beams. Fig. 7 is a plan of the same. Figs. 8 and 9 are'details of the shovel devices.

Referring specifically to the drawings 1a: is a turntable mounted upon a car 31 by means of rollers and a circular track 7 The turntable has at the center a cylindrical casting 1 at the uper end of which is fastened a bevel gear 11, which has a central bearing for a vertical shaft 29. The shaft 29 has a worm 27 which meshes with a gear 26 the Patented May 23, 1911.

Application filed August 31, 1910. Serial No. 579,904.

and 25 and chain 25 to one of the axles of the car, whereby the car is driven. The car may be provided with a suitable brake operated by hand wheel 75. \Vhen the shaft 29 is rotated the car will be driven in an obvious manner. The shaft 29 has at its upper end a gear 32 which may be engaged by a" sliding gear 22, controlled by a suitable lever and yoke, the gear 22 being mounted on a cross shaft 9 supported in suitable stands on the turntable. This shaft 9 also carries a sliding pinion 12 which may be engaged with the gear 11 by means of a lever "When the pinion 12 is engaged and the shaft rotated the turntable will be turned, through the central cylinder 1.

The turntable carries an electric or other motor 8, belted to a pulley 21 on a shaft '73 supported by uprights 34, the belt being indicated at. S. The shaft 73 has a pulley 21 belted. to a pulley 21" the shaft of whichis ed on a shaft supported on the turntable which carries a drum +10. The drum 40 controls the hoist of the shovel through cable 33 and the drum 1-0" controls the thrust of the shovel through cable 16. The cable 33 passes over sheaves 6 to connectionwith a yoke 37 which is pivotally attached at 50 to the thrust beams 4-2 of the shovel. The cable 16 is connected to a segment -l mounted on a rock shaft 74- supported by the standards 34-, and therock shafthas a pair-of crank arms 3 connected by bearing pieces 13 to the thrust beams 42. he segment and crank arms are so disposed that when the former is pulled down by the cable the latter swing forward to force the shovel into the material.

The shovel 43 is pivotally mounted by means of a shaft and suitable bearing pieces 38 to" the front ends of the beams -12, which beams are suitably braced by diagonals 4-1 and cross bars '55, 56, and 57. The

shovel beams also carry ground wheels or I rollers 39 which'support the shovel when lowered, an inch or two above the ground.

The dump or tilt of the shovel is controlled by a lever (36 f'ulcrumcd on the shovel beams and connected by a rod l l and bar (39 to an upright arm Gd fastened to the shovel, and shovel is latched by latch pins 61 connected to levers 5S operated by a pipe or rod d6 connected to a lever 66*, the pins working through guides "63 on a cross piece (10 and, arranged to engage over an angle strap 53 fastened to the heel; of the shovel and arranged to strike an'angle 54- fastened to the beams 42.

The rear end of the shovel is curved 011 the axis 65 a center to fit within or against curved angles 52 fastened to the side beamsfin a position to receive the thrust of the shovel, and said bean'is' also carry angles 51 which serve as side guides to return the shovel to exact position after being dumped.

The rods M and 46 pass through suitable guides on the shovel frame, and the parts will be constructed of,suitable material, prefe'rablyflof structural metal and sheet steel, for the intended purpose. The drums 40 and 40* will be provided with suitable brakes the drumsof which are indicated at.

10 and 10, I

In operation, the shovel will be lowered by letting off the cables 33-and 16, until the rollers-39 rest on theground in front of the pile of material from which the shovel is to take. The car will be suitably positioned by operation of the pinion 9,2 -and the worm shatt 29 and connections to the car wheels. Then the clutch 40 of the drum 40 will be thromi in and by means of the cable 16 segment l, rock shaft 74 and crank arms 3 the shovel will be advanced into the pile. will be thrown in, taking up the cable 33 and hoisting the shovel and its beamsnnd the connecting yoke. Then by manipulation of the pinion the turntable will be turned to swing the-shovel to unloading position where it may be dumped by releasing the latches (31! and operating the lever (16 After being dumped, reverse operation of .Then the clutch 40 of the drum 40- the lever 66 Will swing the shovel to original position where it may be again latched,

and by letting oil the hoisting drums the parts may be returned to original position for the next operation. The driving connections through the center of the turntable provide simple and 'etlicient means for the control of the hoist, and the thrust of the' shovel, and the movement vof the car, by one operator, who may also control the dump effected by the levers 66 and G6 1,

Ha ing thus described my invention, what.

I claim as new and desire to secure by Letters Patent is 1. In an excavator, the combination of a supporting car, a turntable thereon, standards on the turntable, a rock shatt mounted in bearings at the lower part of said standards and having depending cranks at opposite ends, a winding drum mounted on the turntable, a segment on the rock shaft, a cable connecting the drum and segment, a

pair of thrust beams connected at their rear ends to said cranks, a dumping shovel mounted at the front ends of said beams, with its cutting edge, when in dlggmg pos tlon, substantially in ahnementwith the direction of thrust of said beams, and means on the turntable to hoist the beams. v

2. In an excavator, thecombination of a car, a turntable thereonhavmg a central opening, a motor on the turntable, a cross shaftmounted on the turntable and extending over said opening and geared to the motor, driving devices tor the ,car includ-v ing a shaft extending'vertically through the opening and provided with a gear Wheel'at I its upper end, a central bearing cylinder at tached to the car and extending through the turntable and provided with a gear wheel at its upper end, pinions on the cross shaft, en-

gageable with said gear Wheels respectively to drive the car or turn the turntable and an excavating device carried by the turntable.

In testimony whereof, I ailix mysignature in presence 0t two Witnesses.

WILLIAM M. HALE.

Witnesses:

,EUGENE L. MCBRIDE,

M. 1 OConnon'. 

